Java write to. txt file, how to implement the line-wrapping __file

Java to write a. txt file, to implement several ways to wrap:
1. Use the escape character "\ r \ n" in Java:

Java code

1. String str= "AAA";

2. str+= "\ r \ n";

So there's a line of change behind Str.
Note: The order of \r,\n can not be exchanged, otherwise can not achieve the effect of line wrapping.


2.BufferedWriter newline () method:

Java code

1. FileOutputStream fos=new fileoutputstream ("C;\\11.txt");

2. BufferedWriter bw=new bufferedwriter (FOS);

3. Bw.write ("Hello");

4. Bw.newline ();

5. Bw.write ("Java");

6. W.newline ();

3. Use the System.getproperty () method:

Java code

1. String str = "AAA" +system.getproperty ("Line.separator");

As far as I know, there should be no common line breaks in Windows and Linux/unix platforms. For commonly used systems, you can use the following escape characters to implement line breaks:
Text file newline characters under Windows: \ r \ n
Text file newline characters under Linux/unix: \ r
Text file line feed under Mac: \ n